Overview
The Bently Nevada 21000-16-05-00-050-03-02 is a precision proximity probe housing assembly designed for reliable vibration and position monitoring in critical rotating machinery. This assembly integrates a 3300 XL 8 mm probe with a 0.5 meter cable, a 5.0 inch probe penetration, and a 3/4-14 NPT mounting thread. Housed in an aluminum body with a 304 stainless steel sleeve, it is built for harsh industrial environments.

Technical Specifications Breakdown
Key parameters for the 21000-16-05-00-050-03-02 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Model | 21000 - Proximity Probe Housing Assemblies |
| Probe Option | 16 = 3300 XL 8 mm probe |
| Probe Cable Length | 0.5 m (20 in) |
| Probe Penetration | 5.0 in |
| Mounting Thread | 3/4-14 NPT |
| Fitting Option | One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, one cable seal grip with grommets |
| Body Material | Aluminum body with 304 stainless steel sleeve |
| Weight | 1.1 kg (2.4 lb) typical, without fittings |
Industry Applications
This housing assembly is engineered for continuous vibration monitoring on compressors, turbines, pumps, and motors in oil and gas, petrochemical, and power generation facilities. The 3300 XL 8 mm probe provides high-resolution measurement of shaft displacement and eccentricity, enabling early detection of bearing wear or imbalance. The CSA Type 4 enclosure and explosion-proof rating make it suitable for hazardous areas where safety and reliability are paramount.

Installation and Setup Guidance
When installing the 21000-16-05-00-050-03-02, ensure the mounting surface is clean and flat. The 3/4-14 NPT thread requires proper sealing with the provided thread seal to maintain the explosion-proof integrity. The cable seal grip accommodates cable diameters from 1/8 to 3/8 inches. The standoff adapter option is not used here (00), so the probe sleeve length must be verified against the machine geometry. Always follow the manufacturer’s torque specifications for the dome cover and conduit connections.
Maintenance and Reliability
Periodic inspection of the housing assembly is recommended to verify seal integrity and cable condition. The aluminum body with stainless steel sleeve resists corrosion in typical industrial atmospheres. The O-rings should be checked during routine outages and replaced if any signs of deterioration appear. No internal disassembly is required for standard maintenance.
Compatibility and Integration
This assembly is fully compliant with the American Petroleum Institute's API 670 Standard for externally mounted proximity probe housings. It is compatible with Bently Nevada 3300 XL series proximity probes and associated monitors. The CSA approval for hazardous areas ensures integration into safety-instrumented systems without additional certification burdens.
Selection Guide and Purchasing Advice
When selecting a proximity probe housing, verify the required probe penetration, cable length, and mounting thread. AutoDCSTech stocks this assembly as new and original in factory packing with a 12-month warranty. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 21000-16-05-00-050-03-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
